An unbeaten streak is like a field of untouched snow: beautiful while it lasts, but rain, sun, or snowball-wielding kids - or, in this case, perhaps Arsenal - are going to ruin it soon.

Wenger's record against Mourinho stands at (W1 D6 L8) - and the win didn't really count as it was the Community Shield.

Arsenal boast the best shot conversion in the league, have spent the least time trailing of any Premier League side and are coming up against a shaky United team missing key defenders Eric Bailly and Chris Smalling.

2. Alexis Sanchez is bionic.

Sanchez wheels away after scoring against Uruguay (Luis Hidalgo/AP)

Hamstring injury, they said. Out for six weeks, they said.

Instead, the bandaged Chilean magician thundered home two goals for his national side against a team containing Luis Suarez and Edinson Cavani.

"I will train on Friday and travel the same day to Manchester to play Saturday midday. There is no problem with me playing," he told reporters after the game.

He is now just one goal shy of being Chile's all-time top scorer and looks revitalised in a new striker role for Arsenal, scoring eight goals in 15 appearances this season.